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tree-ipa-type-escape slow
- From: Richard Guenther <rguenther at suse dot de>
- To: gcc at gcc dot gnu dot org
- Cc: zadeck at naturalbridge dot com
- Date: Tue, 30 Aug 2005 17:45:59 +0200 (CEST)
- Subject: tree-ipa-type-escape slow
I'm seeing splay tree usage from tree-ipa-type-escape in the first
places of profiles from tramp3d-v4:
samples % image name app name symbol
name
141814 6.5462 no-vmlinux no-vmlinux (no
symbols)
71471 3.2992 cc1plus cc1plus
splay_tree_splay_helper
51114 2.3595 cc1plus cc1plus
comptypes
49001 2.2619 cc1plus cc1plus
compute_may_aliases
-------------------------------------------------------------------------------
11160 15.6147 cc1plus cc1plus
splay_tree_splay
59855 83.7473 cc1plus cc1plus
splay_tree_splay_helper
71471 3.2992 cc1plus cc1plus
splay_tree_splay_helper
71471 43.1489 cc1plus cc1plus
splay_tree_splay_helper [self]
59855 36.1360 cc1plus cc1plus
splay_tree_splay_helper
12966 7.8279 libc-2.3.5.so cc1plus
strcmp
11404 6.8849 cc1plus cc1plus
compare_type_brand
8650 5.2222 cc1plus cc1plus
splay_tree_compare_pointers
-------------------------------------------------------------------------------
looking into the ipa-type-escape code I wonder if there's a reason
to use TYPE_NAME as a key instead of TYPE_UID. Also if TYPE_NAME
is necessary, instead of using "<unnamed>" using NULL and special
casing that will be a lot faster, too. Can you elaborate on what
exactly the datastructure is used for? Maybe for a large number
of types it isn't really the most efficient one.
Thanks,
Richard.